Introduction : OKI Universal Joints provide a simple & economic method of connecting two shafts whose axes are inclined at an angle. They are also used when the angle varies during rotation eliminating the need for the complicated & expensive mechanisms usually associated with this type of application.

Lubrication : For both intermittent & continuously rated joints where constant lubrication (such as an oil bath) is not available joint covers for grease packing are recommended.We introduce our self as manufacturer of all type of universal joints

U joint, Cardan joint, Hardy-Spicer joint, or Hooke's joint is a joint in a rigid rod that allows the rod to 'bend' in any direction, and is commonly used in shafts that transmit rotary motion. It consists of a pair of hinges located close together, oriented at 90° relative to each other, connected by a cross shaft.

What can industrial freewheels do ?RIV Company is the Egyptian agent of STIEBER GmbH, specialized in freewheels, freewheels are directional couplings, which means that the driving member rotates the driven member in one direction, while automatically disengaging itself from the driven member when the direction of rotation is reversed, the two operating states are:1. Transmission of torque.2. Idling (overrunning).

The freewheels may be employed as:a. Overrunning clutch, the freewheel disengages automatically when the driven member rotates faster than the driving member.b. Indexing clutch, the freewheel allows the conversion of reciprocating motion into rotational movement.c. Backstop, the freewheel allows rotation in one direction only, it overruns continuously during operation, the freewheel prevents reverse rotation if the drive is disconnected.Two basic versions are available, the overrunning speed determines the selection of the appropriate model:1. Grip-roller freewheels for low to medium overrunning speeds and for indexing clutches.2. Sprag freewheels for high overrunning speeds and for backstops.

STIEBER in Germany, together with its sister companies WARNER-FORMSPRAG, in USA develop and manufacture the most extensive range of overrunning clutches and backstops available throughout the world. With its two manufacturing locations in Germany it serves both the european and the world market.

STIEBER has more than 60 years experience in development and production of high precision freewheels.Our extensive network of more than 1000 stocking distributors ensures that we are never far away from our customers. Our research development and engineering capabilities provide our customers with the opportunity to challenge us to produce solutions for their specific requirements. These may vary from a special bore, large diameter, up to purpose designed heavy duty and extremely large models (1.7 million Nm).

STIEBER belongs to the industrial power transmission group of Genstar. Other leading names of the same group include Ameridrives, Boston Gear, Warner Electric and Wichita Clutch.

Stiber bearings one way clutch one way bearing , back stop stieber bearings ,

Field of Application: The straightening of cables, strips and wires is performed in steps with successive stages until the final product is obtained. To rationalize the handling between the different steps the material is stocked on reels or on bobbins and takes forms which are not natural.

For every production step, it is therefore necessary to carry out the inverse process by taking the material off its support. At that moment, the straightening operation takes place. It may be divided into three steps:

1) The straightening, consisting of putting the material back into its original shape. The operation is carried out by the first straightening rollers.

2) The removal of the residual constraint in the material, due to the winding on the bobbin. This operation is performed by the rollers located in the central part of the straightener.

3) The forming of the wire carried out by the last rollers on the straightener, generally placed at an angle of 90° compared to the angle of the first rollers.

Often it is necessary to combine these three steps. That is the reason why the straightener uses 5, 7, 9, 11 or even 13 rollers placed in two planes.

The manufacturing precision of the roller has a major influence on the quality of the final product (wires) as well as on the service life of the rollers. It is therefore essential that the rectified "V" notch on the outer ring has the same geometric characteristics and precision as the rest of the bearing. For this reason, the notch on a WIB roller is machined prior to bearing assembly.

Grinding this notch on an assembled standard bearing is risky, as the bearing may be damaged. An acceptable uniformity and geometrical precision can thus not be guaranteed. The service life of the roller is much shorter and the quality of wire drawing suffers accordingly.

Among numerous applications using thread guides and straightening rollers, WIB has managed to make a name for itself in the field of specialized wire drawing companies, producing steel cables for the tire industry.

Field of Application: As a manufacturer of rollers for guidance systems (linear guides)WIB has worked together with customers on the development of several product ranges, supplying the best possible technical and commercial solution to each specific application. The parameters, such as the environment, the precision of functioning, the speed, the temperature, the load, the overturning moment, the boundary dimensions are decisive for defining the most appropriate design.

The above parameters require specific solutions, where the rollers are to be adapted by choosing the Variable Parameters described in the Standard Bearings section and theSpecial Options described in the Special Drawing Bearings section.

The following drawing shows an example of a roller with concave profile, integrated shaft and full complement ball bearing, specially designed for a guide system.

Profiles B, C, D and E may be machined on the outside diameter of the outer ring or on the bore of the inner ring. They are mostly used on rollers for guide systems for the following applications:

Field of Application: Textile machines are required to run at speeds which are regularly increased, and should be simple to maintain and economical to run. These requirements impose specific solutions, where the following parameters have to be optimized:

Only bearings specifically developed for each application will cope with the required specifications. With our wide experience in the field of choosing the Variable Parametersand the Special Options, WIB is in a position to offer the most appropriate solution.

The Examples shown on the following pages are the result of extensive development work and numerous trial runs carried out in co-operation with customers. It is through such joint effort that the quality of the final product has been improved to constantly meet the evolving market demand. All the Profiles have been used for textile machines.

Textile machines also use guidance and straightening systems with special bearings made by WIB and standardized bearings of the following types :

In addition to bearings for textile machines, wire guides and linear guide systems, WIB has designed and manufactured special bearings for a great number of applications. The following list gives a non-exhaustive summary of these fields where new products are being developed every day.

Examples of WIB special bearings specially designed for different fields. Their high manufacturing quality and the diversity of applications demonstrate WIB's extensive know-how in special bearings.

The sales of some of these bearings are reserved to the designer of the system.

SPECIAL BEARINGS Manufacturing of High PrecisionComponents

Apart from standard and special bearing manufacturing program, WIB has the manufacturing capacity to machine high precision components with turning, heat treatment, grinding and honing or super finishing operations.

The drawings on the right hand side show the dimensional limits and the various possible machining operations for parts without or with a bore hole.

Other examples of precision machine parts manufactured by WIB, which can be integrated in special bearings.

Cross Roller Guide Way consists of the precisely ground raceway and the roller cage, in which precision roller are incorporated at right angle to one another, is fitted into to 90v-grooved raceway machined on the race rail.WRG Guide way is compact linear motion system with high rigidity and high accuracy as a kind of linear motion bearing with low frictional resistance, fight clearence & non-circulation method by big rollers with big contact areas as a rolling body.

Cross Roller Guides are used in applications requiring high precision, such as measuring or the manufacturing of optical instruments. A Cross Roller Guide consists of linear guides that are flanked on two sides of a ball cage. In the cage, rollers are placed at right angles to each other to provide multi-directional movement. The high rigidity of SBC's Cross Roller Guide is due to the rollers long contact length. The load capacity is high, the movement is smooth, and mounting is capable in both directions.

Cross Roller Tables from are manufactured by SBC with a precisely machined bed that is mounted with a rail on one side and a Cross Roller Guide on the other to eliminate elastic deformation. The rollers in the cross roller guide can carry heavy loads and maintain a long service life. Cross Roller Tables are designed to provide high rigidity and high performance in applications such as automated assembly equipment and optical measurement devices.

In Cross Roller Guide model VR, precision rollers are orthogonally aligned one after another in aroller cage that is combined with a dedicated rail having a raceway cut into a V-shape groove.When two units of the Cross Roller Guide are mounted in parallel, the guide system is capableof receiving loads in all directions. In addition, since the Cross Roller Guide can be given a preload, a clearance-free, highly rigid and smooth slide mechanism is achieved.The Cross Roller Guide is used in the slide unit of various devices such as OA equipment andits peripherals, measuring instruments, precision equipment including a printed-board drillingmachine, optic measuring machine, optic stage, handling mechanism and X-ray machine.Ball Guide model VB is a low-friction, high-accuracy, finite LM system consisting of precisionsteel balls, arranged in short pitches in a ball cage model B, and a dedicated rail model V.1.1. Structure and Features of the Cross Roller Guide/Ball Guide●Long service life, high rigidityWith a unique roller retaining mechanism, the effective contact length of the rollers is 1.7greater than the conventional type. Furthermore, the roller pitch interval is short and a sufficient number of rollers are installed, thus increasing the rigidity by twice and the service life bysix times greater than the conventional type. As a result, a safety-oriented design againstvibrations and impact, which commonly occur in ordinary linear motion mechanisms, can beachieved.●Smooth motionWith Cross Roller Guide model VR, the rollers are individually held in a cage and roller pocketsformed on the cage are in surface contact with the rollers to increase grease retention. Thus,smooth motion with little wear and friction is achieved.●High corrosion resistanceThe Cross Roller Guide model VR series and the Ball Guide model VB serie

F-3F. Description of the Cross Roller Guide/Ball GuideF 3 Features of the Cross Roller Guide/Ball GuideIn Cross Roller Guide model VR, precision rollers are orthogonally aligned one after another in aroller cage that is combined with a dedicated rail having a raceway cut into a V-shape groove.When two units of the Cross Roller Guide are mounted in parallel, the guide system is capableof receiving loads in all directions. In addition, since the Cross Roller Guide can be given a preload, a clearance-free, highly rigid and smooth slide mechanism is achieved.The Cross Roller Guide is used in the slide unit of various devices such as OA equipment andits peripherals, measuring instruments, precision equipment including a printed-board drillingmachine, optic measuring machine, optic stage, handling mechanism and X-ray machine.Ball Guide model VB is a low-friction, high-accuracy, finite LM system consisting of precisionsteel balls, arranged in short pitches in a ball cage model B, and a dedicated rail model V.1.1. Structure and Features of the Cross Roller Guide/Ball Guide●Long service life, high rigidityWith a unique roller retaining mechanism, the effective contact length of the rollers is 1.7greater than the conventional type. Furthermore, the roller pitch interval is short and a sufficient number of rollers are installed, thus increasing the rigidity by twice and the service life bysix times greater than the conventional type. As a result, a safety-oriented design againstvibrations and impact, which commonly occur in ordinary linear motion mechanisms, can beachieved.●Smooth motionWith Cross Roller Guide model VR, the rollers are individually held in a cage and roller pocketsformed on the cage are in surface contact with the rollers to increase grease retention. Thus,smooth motion with little wear and friction is achieved.●High corrosion resistanceThe Cross Roller Guide model VR series and the Ball Guide model VB series both include typesmade of stainless steel, which is highly resistant to corrosion.F-3F. Description of the Cross Roller Guide/Ball GuideF 3 Features of the Cross Roller Guide/Ball Guide1. Features of the Cross Roller Guide/Ball GuideDedicated railStopperBall cageBallDedicated railStopperRoller cageRollerCross Roller Guide Model VRBall Guide Model VBStoppers of models V1 to V4 have round shapes.Fig. 1 Structure of Cross Roller Guide Model VR and Ball Guide Model VBF-5F. Description of the Cross Roller Guide/Ball GuideF 5 Features of the Cross Roller Guide/Ball Guide1.2. Types and Features of the Cross Roller Guide/Ball Guide●Cross Roller Guide Model VRA compact, highly rigid LM system whoseroller cage holding precision rollers orthogonally aligned one after another travels by halfthe stroke on a V-shaped groove formed on arail.Model VR●Ball Guide Model VBA low- f r ict ion, highly accurate LM systemwhose bal l cage holding precision bal ls inshort pitches travels by half the stroke on aV-shaped groove formed on a rail.Model VBF-6Rated Loads in All DirectionsThe basic load ratings (CZ and C0Z) in the dimensional table in the " General Catalog -Product Specifications," provided separately, indicate the values per rolling element in thedirections shown in Fig. 2. When obtaining the rated life, calculate the basic load ratings (Cand C0) of the actually used rolling elements from the equation below.●For Cross Roller Guide Model VR●For Ball Guide Model VBC ：Basic dynamic load rating （kN）C0 ：Basic static load rating （kN）CZ ：Basic dynamic load rating in the dimensional table in the " GeneralCatalog - Product Specifications," provided separately （kN）C0Z ：Basic static load rating in the dimensional table in the " GeneralCatalog - Product Specifications," provided separately （kN）Z ：Number of rolling elements used(Number of rolling elements within the effective load range)Static Safety Factor fSModels VR and VB may receive an unexpected external force while it is stationary or operativedue to the generation of an inertia caused by vibrations and impact or start-up and stop. It isnecessary to consider a static safety factor against such a working load.fS ：Static safety factor （table 1）C0 ：Basic static load rating （kN）Pc ：Calculated load （kN）C C0C C0CLC0LCLC0LCTC0TCTC0TModel VRModel VBFig. 2Table 1 Reference Values of Static Safety Factors (fS)Lower limitService conditionsof fSMachine using the LM systemGeneral industrialmachineryWithout vibrations or impactWith vibrations or impact1 to 1.32 to 3fS =C0PCC = CL = ( ) ✕ CZ, CT = 2CZ234C0 = C0L = ✕ C0Z, C0T = 2C0Z2Z 2For , truncate the decimals.C = CL = Z ✕ CZ, CT = 2C23C0 = C0L = Z ✕ C0Z, C0T = 2C0F-7F. Description of the Cross Roller Guide/Ball GuideF 7 Features of the Cross Roller Guide/Ball GuideWhen the basic dynamic load ratings have been obtained, the rated lives of Cross Roller Guidemodel VR and Ball Guide model VB are obtained using the following equations.●For Model VR●For Model VBL ：Rated life （km）（The total number of revolutions that 90% of a group of identical VR (VB) units independently operating under the same conditions can achieve without showing flaking）C ：Basic dynamic load rating （kN）PC ：Calculated load （kN）fT ：Temperature factor （see Fig 3 on page F-8）fW ：Load factor （see table 2 on page F-8）When the rated life (L) has been obtained, if the stroke length and the number of reciprocationsper minute are constant, the service life time is obtained using the following equation.Lh ：Service life time （h）RS ：Stroke length （mm）n1 ：Number of reciprocations per minute（min-1）Rated LifeL = ( • ) ✕ 100fTfWCPC103L = ( • )3✕ 50fTfWCPCLh =L ✕ 1062 ✕ RS ✕ n1 ✕ 60Calculating the Service Life TimeF-8■fT：Temperature factorIf the temperature of the atmosphere surr o u n d i n g t h e o p e r a t i n g m o d e l V R o r V Be x c e e d s 1 0 0 ℃, t a k e i n t o a c c o u n t t h eadverse effect of the high temperature andmultiply the basic load ratings by the temperature factor indicated in Fig. 3.Note: If the ambient temperature exceeds 100℃, contact.■fW：Load factorIn general, reciprocating machines tend toinvolve vibrations or impact during operation.It is difficult to accurately determine vibrations generated during high-speed operationand impact during frequent start-up and stop.Therefore, when the actual load applied onmodel VR or VB cannot be obtained, or whenspeed and vibrations have a significant influence, divide the basic load rating (C or C0),by the corresponding load factor in table 2 ofempirically obtained data.Raceway temperature（℃）100 150 2001.00.90.80.7 0.6 0.5Temperature factor fTFig. 3 Temperature Factor (fT)Table 2 Load Factor (fW)FaintWeakVery lowV≦0.25m/sSlow0.25＜V≦1m/s1 to 1.21.2 to 1.5Vibrations/impact Speed (V) fWF-9F. Description of the Cross Roller Guide/Ball GuideF 9 Features of the Cross Roller Guide/Ball GuideThe accuracy of the dedicated rail for the Cross Roller Guide is classified into high grade (H)and precision grade (P) as shown in table 3.Table 3 Accuracy Standards for Dedicated Rail Model VAccuracy symbol High gradeH PPrecision gradeSymbolItemParallelism of the racewayagainst surfaces Å and ıDimensional tolerance in height EDifference in height E(note)Dimensional tolerancein width M±0.020.010–0.2As per Fig. 5±0.010.0050–0.1Unite: mmBAEMNote: The difference in height E applies to four rails used onthe same plane.Fig. 4Rail length L（mm） 016 12 8 4 0200 400 600 800 1000Parallelism of the raceway（μm ）High grade（H）Precision grade（P）Fig. 5 Rail Length and Parallelism of the RacewayF-10The roller cage and the ball cage move halfthe travel distance of the table in the samedirection. To prevent the cage from overhanging f rom the raceway base when thecage length is "R" and the stroke length is"Rs," the rail length (Lk) must be at least thefollowing.Lk≧R＋RS22. Precautions on Using the Cross Roller Guide/Ball GuideRail LengthThe cage, which retains rollers (or balls), demonstrates extremely accurate motion. However,it may be offset as affected by driving vibrations, inertia or impact.If using the Cross Roller Guide or Ball Guide in the following conditions, contact .●Vertical use●Pneumatic cylinder drive●Cam drive●High-speed crank drive●Under a large moment load●Butting the guide's external stopper with the tableOffset of the CageRSRLkLkRS2Lka Disassembling components may cause dust to enter the system or degrade mounting accuracy of parts. Do not disassemble the product. s Dropping or hitting the Cross Roller Guide/Ball Guide may damage it. Giving an impact tothe Cross Roller Guide/Ball Guide could also cause damage to its function even if the product looks intact.Handlinga Thoroughly remove anti-corrosion oil and feed lubricant before using the product.s Do not mix lubricants of different physical properties.d In locations exposed to constant vibrations or in special environments such as clean rooms,vacuum and low/high temperature, normal lubricants may not be used. Contact fordetails.f When planning to use a special lubricant, contact before using it.LubricationF-11F. Description of the Cross Roller Guide/Ball GuideF 11 Precautions on Using the Cross Roller Guide/Ball GuideStoppers are attached to the rail ends in order to prevent the cage from falling off. Note, however, that frequently colliding the cage with the stopper may cause wear of the stopper andloosening of the stopper fastening screws, and may cause the cage to fall off.StopperAs a means to prevent foreign matter from entering the Cross Roller Guide or the Ball Guide,dust prevention accessories for the side faces as shown in Fig. 1 are available. For dust prevention in the front and rear directions, consider using a bellows or a telescopic cover.Dust PreventionLabyrinth cover Wiper sealFig. 1 Dust Prevention Methodsa If foreign matter such as dust or cutting chips adheres to the product, replenish the lubricantafter cleaning the product with pure white kerosene. s When desiring to use the system at temperature of 100℃ or higher, contact in advance.d When using the product in locations exposed to constant vibrations or in special environments such as clean rooms, vacuum and low/high temperature, contact in advance.Precautions on UseWhen storing the Cross Roller Guide/Ball Guide, enclose it in a package designated by and store it while avoiding high temperature, low temperature and high humidity.Storage

Compact design, high precision and rigidity, and wide range of permissible load- It's used widely in various precision instruments and machineries- Miniature Type

Compact design, high precision and rigidity, and wide range of permissible load.- It's used widely in various precision instruments and machineries.

The smooth surfaces are created from sanding and anodizing finishes, expand the possibilities of using wider ranges of colors to be applied.- The use of aluminum reduces the process and simplified the quality.- Any sizes can be custom made other than the company's standard marked sizes: 40x40 /60x60/ 70x70/ 80x80/ 100x100

Vardhman bearings Miniature bearings (micro bearings or mini bearings). We stock miniature bearings in metric sizes with inner diameters from 0.6mm upwards and inch sizes with inner diameters from 0.04 inchesStainless steel bearings. Radial stainless steel ball bearings are supplied for up to 50mm shaft size from stock.Plastic bearings.Bearings with acetal resin rings and either glass balls or stainless steel balls are held in stock.Thin section bearings.We stock a range of flanged and non flanged thin section bearings from 10mm up to 50mm shaft.Electric motor bearings.Where an application calls for low noise and low vibration levels, we can supply EMQ2 electric motor bearings from stock to fit 3mm shaft size up to 40mm

Vardhman bearings is a specialized manufacturer of miniature bearings,miniature bearing,miniature ball bearing,miniature ball bearings.Our metric series miniature bearings (mini bearings) and small bearings are available open, shielded or sealed, with bore sizes as small as 0.6mm. The smaller sizes are sometimes referred to as instrument bearings or micro bearings. We provide metric sizes for applications as varied as food processing and electric motor bearings.Our entire metric series of bearings can be supplied in SAE52100 chrome steel and AISI440C or KS440 (ACD34/X65Cr13) stainless steel and, like most deep groove radial ball bearings, can withstand heavy radial loads and moderate thrust loads in both directions. Certain sizes can be supplied with the TW high-speed synthetic cage and most metric miniature bearings and small bearings can be supplied flanged.Silver-Ball Bearings manufactures more than 8,500 different types of miniature and small-sized ball bearings, most of which have external diameters of 22mm or less., google search web miniature bearings vardhman bearings